Yamaha PW50 60cc Big Bore Kit 1979-2009 (top end cylinder kit) Bolt on 60cc Big Bore Kit for Yamaha PW50 and QT50 Pit Bikes. This is a complete top end cylinder kit including head, ready to install out of the box. Breathe new life into your kid's bike with our high quality, affordable and reliable big bore kit!

Yamaha PW50 60cc Big Bore Kit 1979-2009 (top end cylinder kit with head included) Bolt on 60cc Big Bore Kit for Yamaha PW50 and QT50 Pit Bikes. This is a complete top end cylinder kit including head, ready to install out of the box. Breathe new life into your kid's bike with our high quality, affordable and reliable...